Dr. Sheri Molnar

Seismology

Sheri Molnar

Assistant Professor
Ph.D. University of Victoria, 2011

Office: BGS 1040
Lab: BGS 0155
Phone: 519-661-2111 x87031
Fax: 519-661-3198
Email: smolnar8@uwo.ca

Research Interests

Seismic hazards, with a focus on earthquake path and site effects; Surface seismic field techniques for shallow crustal velocity structure; Numerical (parallel computing) wave propagation simulation of scenario earthquakes; Seismic risk and loss estimation; Seismic hazards due to induced seismicity

Selected Publications

  • S. Molnar, C. E. Ventura, R. Boroschek, and M. Archila. Site characterization at Chilean strong-motion stations: Comparison of downhole and microtremor shear-wave velocity methods, Soil Dynamics and Earthquake Engineering, revision in review.
  • S. Molnar, C. E. Ventura, W. D. L. Finn, H. Crow, T. Stokes, P. Lapcevic, D. Paradis, 2014. Regional seismic hazard assessment for small urban centers in western Canada, Proceedings 10th NCEE, Anchorage, Alaska, July 21-25, 2014, Paper 1689.
  • S. Molnar, J. F. Cassidy, K. B. Olsen, S. E. Dosso, and J. He, 2014. Earthquake ground motion and 3D Georgia basin amplification in SW British Columbia: Deep Juan de Fuca plate scenario earthquakes, Bulletin of the Seismological Society of America, 104, 301-320, doi: 10.1785/0120110277.
  • S. Molnar, J. F. Cassidy, K. B. Olsen, S. E. Dosso, and J. He, 2014. Earthquake ground motion and 3D Georgia basin amplification in SW British Columbia: Shallow blind-thrust scenario earthquakes, Bulletin of the Seismological Society of America, 104, 321-335, doi: 10.1785/0120130116.
  • S. Molnar, J. F. Cassidy, and S. E. Dosso, 2013. Uncertainty of linear earthquake site amplification via Bayesian inversion of surface seismic data, Geophysics, 78(3), WB37-WB48, doi: 10.1190/geo2012-0345.1.
  • J. Dettmer, S. Molnar, G. Steininger, S. E. Dosso, and J. F. Cassidy, 2012. Trans-dimensional inversion of microtremor array dispersion data with hierarchical autoregressive error models, Geophysical Journal International, 188, 719-734, doi: 10.1111/j.1365-246X.2011.05302.x.
  • S. Molnar, 2012. Frequency-wavenumber (f-k) ambient noise array method, in Shear wave velocity measurement guidelines for Canadian seismic site characterization in soil and rock, J. Hunter and H. Crow (eds.), GSC Open File 7078, 101-108.
  • S. Molnar, S. E. Dosso, and J. F. Cassidy, 2010. Bayesian inversion of microtremor array dispersion data in southwestern British Columbia, Geophysical Journal International, 183, 2, November, 923-940, doi: 10.1111/j.1365-246X.2010.04761.x.
  • J. F. Cassidy and S. Molnar, 2009. Earthquake site response studies in Canada: Recent advances and applications, in Increasing Seismic Safety by Combining Engineering Technologies and Seismological Data, M. Mucciarelli, M. Herak, and J. F. Cassidy (Eds.), Springer, 2009, 257-279.
  • S. Molnar, and J. F. Cassidy, 2006. A comparison of site response techniques using weak-motion earthquakes and microtremors, Earthquake Spectra, 22, 169-188.
  • S. Molnar, J. F. Cassidy, and S. E. Dosso, 2004. Site response in Victoria, British Columbia, from spectral ratios and 1D modeling, Bulletin of the Seismological Society of America, 94, 1109-1124.
  • S. Molnar, J. F. Cassidy, and S. E. Dosso, 2004. Comparing intensity variation of the 2001 Nisqually earthquake to geology in Victoria, British Columbia, Bulletin of the Seismological Society of America, 94, 2229-2238.

Courses 

  • Earth Sciences 1022: Earth Rocks!
  • Earth Sciences 2222A/B: Data Analysis & Signal Processing
  • Earth Sciences 4451Z: Geophysics Field Techniques
  • Geophysics 9508: Applied Seismology

Current Students

  • Hema Sharma, PhD Geophysics Candidate (Co-Supervisor)
  • Jacob Kukovica, MSc Geophysics Candidate (Co-Supervisor)
  • Sujan Raj Adhikari, PhD Geophysics Candidate 
  • Alex Bilson Darko, MSc Geophysics Candidate (Co-Supervisor)
  • Chris Boucher, MSc Geophysics Candidate
  • Alireza Javanbakht Samani, PhD Geophysics Candidate
  • Sameer Ladak, MSc Geophysics Candidate
  • Meredith Fyfe, MSc Geophysics Candidate

Future Students

Dr. Molnar currently has openings for M.Sc. and Ph.D. students interested in the following research areas/projects:

Broadband Simulation of Ground-Motions. Funded by a New Frontiers in Research Funding (NFRF) grant. This two-year grant involves simulation of earthquake waveforms using 3D wave propagation algorithms related to Cascadia megathrust shaking and risk analyses in collaboration with researchers and their students at the University of British Columbia (UBC). Suitable for highly motivated students with backgrounds in computer and parallel programming or computational geo/physics. Students with strong computational and programming skills are encouraged to apply.

Availability: One MSc student to start as soon as possible. Contact hghofran@uwo.ca with resume or CV and transcript(s).

Metro Vancouver Seismic Microzonation Project. Funded by Emergency Management British Columbia (EMBC) and the Institute for Catastrophic Loss Reduction (ICLR). This six-year project involves generating comprehensive earthquake hazard maps for Metro Vancouver, including:

  • Earthquake shaking hazard (amplification, basin effects, site class, site period)
  • Liquefaction susceptibility hazard, and
  • Landslide susceptibility hazard

Suitable for highly motivated students with backgrounds in geology, geophysics, geotechnical engineering, earthquake engineering, geography (GIS, mapping), or geological engineering. Co-supervision in civil engineering is available.

Availability: MSc and PhD students starting May 2020. Contact smolnar8@uwo.ca with resume or CV and transcript(s). Applications should be received through Western’s online system by January 2020.  

Ambient Noise Tomography (ANT). In this project we are aiming to produce high-resolution three-dimensional (3D) shear wave velocity models at various scales, with emphasis on the upper 10’s of kilometers. ANT will be utilized with continuous data from permanent and temporary broadband and short-period stations to construct a 3D shear-wave velocity model in the study region.  Suitable for highly motivated students with backgrounds in geology, geo/physics, computer science and/or civil engineering.  

Availability: MSc or PhD student starting Fall 2020. Contact smolnar8@uwo.ca with resume or CV and transcript(s). Applications should be received through Western’s online system by January 2020.